In less than a month, our Disrupt conference returns to San Francisco — and with it, one of our legendary Hackathons.

We’ve released two big batches of Disrupt SF Hackathons tickets so far. Both of them sold out so fast that it was almost scary.

Here. Have another batch.

I’ve said it before, but I’ll say it again: If you’ve never been to one of our Hackathons, it’s tough to explain just what you’re missing. Take a gym-sized room and cram it full of incredibly talented developers. Give’m 24 hours to build their craziest ideas, with thousands of dollars in prizes and an opportunity to present their hacks to the entire Disrupt audience on the line. Give’m enough pizza to feed an army. We close the doors, cross our fingers.. and what we end up with on the other side is always something incredible.

There’ve been sudden, late-night NERF wars. There’ve been impromptu (and dangerously competitive) 50-person dodgeball games. We’ve seen people build everything from apps that teach teens to drive to a robot that wants to stab you. We’ve had founders meet each other here, and we’ve seen Hackathon projects later spun into full-fledged companies go on to be acquired for millions.

If you’re going to build it somewhere, you really should be building it here.

(Shout out to the guy who mined the ticket widget to figure out when our previous ticket batch was scheduled to be released. That’s the spirit! Note to self: don’t pre-schedule ticket releases anymore.)

Here’s what you need to know:

As long as you’re building something, participating in the Hackathon is free. Interested sponsors, give us a shout.

After 24 hours of building, hackers present their projects to their peers and a panel of all-star judges (we’ll announce those judges in an upcoming post).

Every hacker who finishes their project and presents onstage gets a free pass to the entire conference, normally valued at around $2,000. Why? Because you’re awesome and we love you.

The team behind the best hack of the day takes home a cool $5,000, and the top three teams all get to present their projects to the Disrupt audience. There will also be a bunch of prizes awarded by the Hackathon sponsors — more news on those in a few days.

The Disrupt SF 2013 Hackathon runs from September 7th to the 8th, and we’ve just released a big batch of tickets. Don’t delay, though — these things go fast.

Our sponsors help make Disrupt happen. If you are interested in learning more about sponsorship opportunities, please contact our sponsorship team here sponsors@beta.techcrunch.com.